A WINTER STORM WARNING FOR SNOW MEANS THAT HEAVY SNOWFALL WILLMAKE TRAVEL DANGEROUS. IF YOU MUST VENTURE OUT AT ALL...USEEXTREME CAUTION. REPORT SNOW ACCUMULATION TO THE NATIONAL WEATHERSERVICE BY CALLING...412-262-1988...POSTING TO THE NWS PITTSBURGHFACEBOOK PAGE...OR USING TWITTER @NWSPITTSBURGH.